闫伟, 袁运斌, 欧吉坤, 李得海. 非组合精密单点定位算法精密授时的可行性研究[J]. 武汉大学学报 ( 信息科学版), 2011, 36(6): 648-651.
引用本文: 闫伟, 袁运斌, 欧吉坤, 李得海. 非组合精密单点定位算法精密授时的可行性研究[J]. 武汉大学学报 ( 信息科学版), 2011, 36(6): 648-651.
YAN Wei, YUAN Yunbin, OU Jikun, LI Dehai. Feasibility of Precise Timing with Uncombined PPP[J]. Geomatics and Information Science of Wuhan University, 2011, 36(6): 648-651.
Citation: YAN Wei, YUAN Yunbin, OU Jikun, LI Dehai. Feasibility of Precise Timing with Uncombined PPP[J]. Geomatics and Information Science of Wuhan University, 2011, 36(6): 648-651.

非组合精密单点定位算法精密授时的可行性研究

Feasibility of Precise Timing with Uncombined PPP

  • 摘要: 利用基于GPS双频原始观测数据的非组合精密单点定位(PPP)算法进行精密授时,给出了其数学模型与数据预处理策略。实验结果表明,非组合PPP算法可以有效避免传统PPP算法由于观测值组合过程中观测噪声及多路径效应误差被放大而造成的对接收机钟差解算的不利影响,实现亚纳秒级(0.3 ns)的钟差解算精度;同等条件下,非组合PPP算法授时精度优于传统PPP算法,可以用于精密授时解算。

     

    Abstract: The theory and mathematical model of uncombined precise point positioning were proposed.And several effective data processing strategies were proposed to improve PPP receiver clock solution by avoid absorbing some un-modeled system errors.Full-featured PPP software was developed base on the GPSTk core library.Experiments with data from IGS stations distributed all over the world were carried out to evaluate the performance of GPS timing with uncombined PPP algorithm.The results support that PPP algorithm can achieve sub-nanosecond(0.3 ns) level receiver clock solution,and the uncombined PPP algorithm has better accuracy than the classic PPP algorithm with all things being equal.

     

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